JSOn Datatype

The parameter part of each parameter:value pair must follow a few simple grammatical rules:

• It must not be a JavaScript reserved keyword.
• It must not start with a number.
• It must not include any special characters except the underscore or dollar sign. The values in JSON objects can contain any of the following data types:
• Number
• String
• Boolean
• Array
• Object
• null (empty)
JavaScript syntax has several data types that are not included in the JSON standard, including Date, Error, Math, and Function. These data types must be represented as some other data format, with the encoding and decoding programs following the same encoding and decoding rules.